The analysis of public database of gene expression arrays (http://kmplot.com/analysis/) reveals that ovarian cancer patients with higher expression of NEDD4L suffered a lower progression-free survival for stage 3–4 patients than those with lower NEDD4L expression (Supplementary Figure S4), indicating an association between high NEDD4L expression and poor outcome for ovarian cancer patients at advanced stages. This evidence concerns the gene NEDD4L and ovarian cancer.